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Title: Correlation of magnetoelectric coupling in multiferroic BaTiO3-BiFeO3 superlattices with oxygen vacancies and antiphase octahedral rotations
Authors: Lorenz, Michael ×
Wagner, Gerald
Lazenka, Vera
Schwinkendorf, Peter
Modarresi, Hiwa
Van Bael, Margriet
Vantomme, André
Temst, Kristiaan
Oeckler, Oliver
Grundmann, Marius #
Issue Date: 6-Jan-2015
Publisher: American Institute of Physics
Series Title: Applied Physics Letters vol:106 issue:1 pages:0129051-0129055
Article number: 012905
Abstract: Multiferroic (BaTiO3-BiFeO3) × 15 multilayer heterostructures show high magnetoelectric (ME) coefficients αME up to 24 V/cm·Oe at 300 K. This value is much higher than that of a single-phase BiFeO3 reference film (αME = 4.2 V/cm·Oe). We found clear correlation of ME coefficients with increasing oxygen partial pressure during growth. ME coupling is highest for lower density of oxygen vacancy-related defects. Detailed scanning transmission electron microscopy and selected area electron diffraction microstructural investigations at 300 K revealed antiphase rotations of the oxygen octahedra in the BaTiO3 single layers, which are an additional correlated defect structure of the multilayers.
ISSN: 0003-6951
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Nuclear and Radiation Physics Section
Solid State Physics and Magnetism Section
× corresponding author
# (joint) last author

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